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ASTM D4705-18(2023)

(Test Method)

Standard Test Method for Stitch Tear Strength of Leather, Double Hole

Standard Test Method for Stitch Tear Strength of Leather, Double Hole

SIGNIFICANCE AND USE
3.1 This test method is designed to measure the load required to tear leather through two holes in the test specimen. Tanners and leather buyers have found that this test gives an indication of the resistance of leather to tearing. It is of particular value in estimating the durability of leather to withstand tearing stresses encountered in the manufacture of shoes, garments, and upholstered products. The thickness of the specimen and direction of tear relative to the backbone will affect the uniformity of the test results. This test method may not apply when the conditions of the test employed differ widely from those specified in the test method.
SCOPE
1.1 This test method is intended for use in determining the stitch tearing resistance of leather using a double hole tear. It is particularly applicable to lightweight leathers. This test method does not apply to wet blue.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Dec-2022
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.07 - Physical Properties
Current Stage
Ref Project

Relations

Refers
ASTM D1813-13 - Standard Test Method for Measuring Thickness of Leather Test Specimens
Effective Date
01-May-2013
Refers
ASTM D1610-01(2013) - Standard Practice for Conditioning Leather and Leather Products for Testing
Effective Date
01-May-2013
Refers
ASTM D1813-00(2010) - Standard Test Method for Measuring Thickness of Leather Test Specimens
Effective Date
01-Oct-2010
Refers
ASTM D2209-00(2010) - Standard Test Method for Tensile Strength of Leather
Effective Date
01-Apr-2010
Refers
ASTM D2813-03(2008) - Standard Practice for Sampling Leather for Physical and Chemical Tests
Effective Date
01-Sep-2008
Refers
ASTM D1610-01(2007) - Standard Practice for Conditioning Leather and Leather Products for Testing
Effective Date
01-Apr-2007
Refers
ASTM D1813-00(2005) - Standard Test Method for Measuring Thickness of Leather Test Specimens
Effective Date
01-Apr-2005
Refers
ASTM D2209-00(2004) - Standard Test Method for Tensile Strength of Leather
Effective Date
01-Sep-2004
Refers
ASTM D2813-03 - Standard Practice for Sampling Leather for Physical and Chemical Tests
Effective Date
01-Oct-2003
Refers
ASTM D1610-01 - Standard Practice for Conditioning Leather and Leather Products for Testing
Effective Date
10-May-2001
Refers
ASTM D1610-00 - Standard Practice for Conditioning Leather and Leather Products for Testing
Effective Date
10-May-2001
Refers
ASTM D2209-00 - Standard Test Method for Tensile Strength of Leather
Effective Date
10-Sep-2000
Refers
ASTM D1813-00 - Standard Test Method for Measuring Thickness of Leather Test Specimens
Effective Date
10-May-2000
Refers
ASTM D2813-97 - Standard Practice for Sampling Leather for Physical and Chemical Tests
Effective Date
10-Apr-1997

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ASTM D4705-18(2023) - Standard Test Method for Stitch Tear Strength of Leather, Double HoleASTM D4705-18(2023) - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
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ASTM D4705-18(2023) - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4705 − 18 (Reapproved 2023)
Standard Test Method for
Stitch Tear Strength of Leather, Double Hole
This standard is issued under the fixed designation D4705; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Tanners and leather buyers have found that this test gives an
indication of the resistance of leather to tearing. It is of
1.1 This test method is intended for use in determining the
particular value in estimating the durability of leather to
stitch tearing resistance of leather using a double hole tear. It is
withstand tearing stresses encountered in the manufacture of
particularly applicable to lightweight leathers.This test method
shoes, garments, and upholstered products. The thickness of
does not apply to wet blue.
the specimen and direction of tear relative to the backbone will
1.2 The values stated in inch-pound units are to be regarded
affect the uniformity of the test results. This test method may
as standard. The values given in parentheses are mathematical
not apply when the conditions of the test employed differ
conversions to SI units that are provided for information only
widely from those specified in the test method.
and are not considered standard.
4. Apparatus
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 Testing Machine, as described in Test Method D2209.
responsibility of the user of this standard to establish appro-
4.2 ThicknessGauge, a dead weight type of thickness gauge
priate safety, health, and environmental practices and deter-
as described in Method D1813.
mine the applicability of regulatory limitations prior to use.
4.3 Steel Die, to cut test specimens (as described in 5.1).
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.4 Paper Clip, Smooth, with wire diameter 0.041 in. 6
ization established in the Decision on Principles for the
0.002 in. (1.04 mm 6 0.05 mm).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5. Sampling Test Specimen
Barriers to Trade (TBT) Committee.
5.1 Unless otherwise specified, sample the leather according
2. Referenced Documents to Practice D2813.
2.1 ASTM Standards: 5.2 The specimen shall be a rectangle of leather 2 in.
D1610 Practice for Conditioning Leather and Leather Prod- (50.8 mm) in length and 1 in. (25.4 mm) in width with two
ucts for Testing holes ( ⁄64 in. (1.98 mm)) in diameter on one end of the
D1813 Test Method for Measuring Thickness of Leather specimen. The centers of the holes shall be ⁄4 in. (6.35 mm)
Test Specimens from the end, ⁄4 in. (6.35 mm) apart, and located equidistant
D2209 Test Method for Tensile Strength of Leather from the center line (length wise) of the specimen. See Fig. 1.
D2813 Practice for Sampling Leather for Physical and
5.3 The specimen shall be cut with the long dimension
Chemical Tests
perpendicular to the backbone.
3. Significance and Use
6. Conditioning
3.1 This test method is designed to measure the load
6.1 All specimen shall be conditioned and tested in an
required to tear leather through two holes in the test specimen.
atmosphere as described in Practice D1610.
This
...

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